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Is it that easy to install Python ?

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  Is it that easy to install Python ? santiago.diez@caoba.fr - 2013-07-25 08:11 -0700
    Re: Is it that easy to install Python ? Maarten <maarten.sneep@knmi.nl> - 2013-07-25 09:13 -0700
    Re: Is it that easy to install Python ? Matthew Lefavor <mclefavor@gmail.com> - 2013-07-25 12:15 -0400
    Re: Is it that easy to install Python ? Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2013-07-25 18:36 +0200
      Re: Is it that easy to install Python ? Chris Angelico <rosuav@gmail.com> - 2013-07-26 02:44 +1000
    Re: Is it that easy to install Python ? Grant Edwards <invalid@invalid.invalid> - 2013-07-25 18:32 +0000
    Re: Is it that easy to install Python ? wizzofozz <oscxxxxxxxaas@gmail.com> - 2013-07-28 00:05 +0200
      Re: Is it that easy to install Python ? santiago.diez@caoba.fr - 2013-07-31 03:08 -0700
        Re: Is it that easy to install Python ? Ian Kelly <ian.g.kelly@gmail.com> - 2013-07-31 10:44 -0600
        Re: Is it that easy to install Python ? Ian Kelly <ian.g.kelly@gmail.com> - 2013-07-31 10:49 -0600

#51232 — Is it that easy to install Python ?

Hi there,

I never write any Python program but as a system administrator, I'm often asked to install python on Debian servers.

I just finished downloading, configuring, making and installing.

The binary is now installed in :
/usr/local/Python-2.7.5/bin/python2.7
(the path is a deliberate administrator choice).

Is that it?

What else will my users need?

Regards
Santiago

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#51240

On Thursday, July 25, 2013 5:11:15 PM UTC+2, santia...@caoba.fr wrote:
> Hi there,
> 
> I never write any Python program but as a system administrator, I'm often asked to install python on Debian servers.
> 
> I just finished downloading, configuring, making and installing.
> 
> The binary is now installed in :
> /usr/local/Python-2.7.5/bin/python2.7
> (the path is a deliberate administrator choice).
> 
> Is that it?

Probably.

> What else will my users need?

The path must be search $PATH in the environment where Python is used, so that standard scripts starting with "#!/usr/bin/env python" will find your python.

Next your users will probably start requesting additional packages (regex, lxml, numpy, scipy, matplotlib, ... depending on what they actually do).

Maarten

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#51241

[Multipart message — attachments visible in raw view] — view raw

On Thu, Jul 25, 2013 at 11:11 AM, <santiago.diez@caoba.fr> wrote:

> Hi there,
>
> I never write any Python program but as a system administrator, I'm often
> asked to install python on Debian servers.
>
> I just finished downloading, configuring, making and installing.
>
> The binary is now installed in :
> /usr/local/Python-2.7.5/bin/python2.7
> (the path is a deliberate administrator choice).
>
> Is that it?
>
> What else will my users need?
>
They may need permission to install third-party modules themselves. That
would probably require write permissions to /usr/local/Python-2.7.5/lib. If
you are unwilling to grant those permissions, you can suggest that they
learn how to work with "virtualenvs" (http://www.virtualenv.org/en/latest/),
which would allow them to install third-party modules locally.

And, of course, they need to be saavy enough to put the new python
installation on the PATH.

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#51245

On 25-7-2013 17:11, santiago.diez@caoba.fr wrote:
> Hi there,
> 
> I never write any Python program but as a system administrator, I'm often asked to install python on Debian servers.
> 
> I just finished downloading, configuring, making and installing.
> 
> The binary is now installed in :
> /usr/local/Python-2.7.5/bin/python2.7
> (the path is a deliberate administrator choice).
> 
> Is that it?
> 
> What else will my users need?

Why didn't you use the Debian package instead? You now have installed an unsupported,
untested custom built Python version on your server. Why not simply

$ apt-get install python

and let the Debian package maintainers take care of properly testing and supporting
it... Also, installing additional python packages will be much less of a hassle because
there's hundreds of them readily available in Debian's package repositories and they can
be installed (including correct dependencies) in the same way.


Irmen

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#51246

On Fri, Jul 26, 2013 at 2:36 AM, Irmen de Jong <irmen.NOSPAM@xs4all.nl> wrote:
> On 25-7-2013 17:11, santiago.diez@caoba.fr wrote:
>> Hi there,
>>
>> I never write any Python program but as a system administrator, I'm often asked to install python on Debian servers.
>>
>> I just finished downloading, configuring, making and installing.
>>
>> The binary is now installed in :
>> /usr/local/Python-2.7.5/bin/python2.7
>> (the path is a deliberate administrator choice).
>>
> Why didn't you use the Debian package instead? You now have installed an unsupported,
> untested custom built Python version on your server. Why not simply
>
> $ apt-get install python

That'll do fine on Debian 7 (Wheezy, current stable). On Debian 6
(Squeeze, oldstable), that'll get you a 2.6 release IIRC.

ChrisA

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#51251

On 2013-07-25, santiago.diez@caoba.fr <santiago.diez@caoba.fr> wrote:
> Hi there,
>
> I never write any Python program but as a system administrator, I'm
> often asked to install python on Debian servers.

Are you sure it's not already installed?  I haven't seen a Linux
distro for a _long_ time that didn't include Python as part of the
base installation.

> I just finished downloading, configuring, making and installing.
>
> The binary is now installed in :
> /usr/local/Python-2.7.5/bin/python2.7

Why not just apt-get install python?

-- 
Grant Edwards               grant.b.edwards        Yow! Uh-oh!!  I'm having
                                  at               TOO MUCH FUN!!
                              gmail.com            

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#51374

On 25-7-2013 17:11, santiago.diez@caoba.fr wrote:
> Hi there,
> 
> I never write any Python program but as a system administrator, I'm often asked to install python on Debian servers.
> 
> I just finished downloading, configuring, making and installing.
> 

As a side note to all who have replied already; as a 'regular' linux
user you can also just download, untar, configure and make.
You can't do 'make install', but that's not required to run the
executables (in this case 'python') built in the previous steps.

just nitpicking .. :-)

cheers,
Ozz

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#51637

OK thanks for your answers.
So Python is not a daemon. Is it?
Does it have a config file?

Actually, each site on the web server is jailed in a chrooted environment.
In the chrooted environment, Python appears to be in /usr/bin/python.

If I give developers write access to a folder like /usr/lib/python/dist-packages/ (in the chrooted environment), will this be sufficient?

Regards
Santiago

PS: Thanks for all your opinions about how one should install Python but that wasn't the purpose of this thread. Most programs on my servers are compiled. Period.

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#51670

On Wed, Jul 31, 2013 at 4:08 AM,  <santiago.diez@caoba.fr> wrote:
> OK thanks for your answers.
> So Python is not a daemon. Is it?

No.

> Does it have a config file?

Not as such.  Arbitrary site-specific customization can be done by
creating a sitecustomize module, but this is not standard.  There are
also some environment variables that you may want to consider setting
in the system profile, but none are required or generally recommended:

http://docs.python.org/2/using/cmdline.html#environment-variables

> Actually, each site on the web server is jailed in a chrooted environment.
> In the chrooted environment, Python appears to be in /usr/bin/python.
>
> If I give developers write access to a folder like /usr/lib/python/dist-packages/ (in the chrooted environment), will this be sufficient?

I don't have experience with this, but it seems to me that you should
place the standard library and site-packages in the chrooted
/usr/lib/python2.7 and then set the PYTHONHOME environment variable to
/usr/lib.

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#51672

On Wed, Jul 31, 2013 at 10:44 AM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> and then set the PYTHONHOME environment variable to /usr/lib.

Rather, just /usr.

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